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  1. docs/ko/docs/advanced/advanced-python-types.md

    어떤 이유로 코드에서 `|`를 사용할 수 없다면, 예를 들어 타입 어노테이션이 아니라 `response_model=` 같은 곳이라면, 파이프 문자(`|`) 대신 `typing`의 `Union`을 사용할 수 있습니다.
    
    예를 들어, 어떤 값이 `str` 또는 `None`이 될 수 있다고 선언할 수 있습니다:
    
    ```python
    from typing import Union
    
    
    def say_hi(name: Union[str, None]):
            print(f"Hi {name}!")
    ```
    
    `typing`에는 `None`이 될 수 있음을 선언하는 축약형으로 `Optional`도 있습니다.
    
    아주 개인적인 관점에서의 팁입니다:
    
    - 🚨 `Optional[SomeType]` 사용은 피하세요
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Sat Feb 14 08:57:01 GMT 2026
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  2. docs/de/docs/advanced/advanced-python-types.md

    Zum Beispiel könnten Sie deklarieren, dass etwas ein `str` oder `None` sein könnte:
    
    ```python
    from typing import Union
    
    
    def say_hi(name: Union[str, None]):
            print(f"Hi {name}!")
    ```
    
    `typing` hat außerdem eine Abkürzung, um zu deklarieren, dass etwas `None` sein könnte, mit `Optional`.
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Sat Feb 14 07:57:30 GMT 2026
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  3. docs/es/docs/advanced/advanced-python-types.md

    Por ejemplo, podrías declarar que algo podría ser un `str` o `None`:
    
    ```python
    from typing import Union
    
    
    def say_hi(name: Union[str, None]):
            print(f"Hi {name}!")
    ```
    
    `typing` también tiene un atajo para declarar que algo podría ser `None`, con `Optional`.
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Fri Feb 13 13:41:41 GMT 2026
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  4. docs/en/docs/advanced/advanced-python-types.md

    For example, you could declare that something could be a `str` or `None`:
    
    ```python
    from typing import Union
    
    
    def say_hi(name: Union[str, None]):
            print(f"Hi {name}!")
    ```
    
    `typing` also has a shortcut to declare that something could be `None`, with `Optional`.
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Wed Feb 11 18:32:12 GMT 2026
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  5. docs/fr/docs/advanced/advanced-python-types.md

    Par exemple, vous pourriez déclarer que quelque chose peut être un `str` ou `None` :
    
    ```python
    from typing import Union
    
    
    def say_hi(name: Union[str, None]):
            print(f"Hi {name}!")
    ```
    
    `typing` propose également un raccourci pour déclarer que quelque chose peut être `None`, avec `Optional`.
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Sat Feb 14 08:12:41 GMT 2026
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  6. docs/zh/docs/advanced/advanced-python-types.md

    ## 使用 `Union` 或 `Optional` { #using-union-or-optional }
    
    如果你的代码因为某些原因不能使用 `|`,例如它不是在类型注解里,而是在 `response_model=` 之类的参数中,那么你可以使用 `typing` 中的 `Union` 来代替竖线(`|`)。
    
    例如,你可以声明某个值可以是 `str` 或 `None`:
    
    ```python
    from typing import Union
    
    
    def say_hi(name: Union[str, None]):
            print(f"Hi {name}!")
    ```
    
    `typing` 也提供了一个声明“可能为 `None`”的快捷方式:`Optional`。
    
    从我非常主观的角度给个小建议:
    
    - 🚨 避免使用 `Optional[SomeType]`
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Fri Feb 13 13:37:57 GMT 2026
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  7. docs/zh-hant/docs/advanced/advanced-python-types.md

    ## 使用 `Union` 或 `Optional` { #using-union-or-optional }
    
    如果你的程式碼因某些原因無法使用 `|`,例如不是在型別註記中,而是在像 `response_model=` 之類的參數位置,那麼你可以用 `typing` 中的 `Union` 來取代豎線(`|`)。
    
    例如,你可以宣告某個值可以是 `str` 或 `None`:
    
    ```python
    from typing import Union
    
    
    def say_hi(name: Union[str, None]):
            print(f"Hi {name}!")
    ```
    
    在 `typing` 中也有用 `Optional` 宣告某個值可以是 `None` 的速記法。
    
    以下是我個人(非常主觀)的建議:
    
    * 🚨 避免使用 `Optional[SomeType]`
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Sat Feb 14 08:15:26 GMT 2026
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  8. fastapi/.agents/skills/fastapi/references/dependencies.md

    When using dependencies with `yield`, they can have a `scope` that defines when the exit code is run.
    
    Use the default scope `"request"` to run the exit code after the response is sent back.
    
    ```python
    from typing import Annotated
    
    from fastapi import Depends, FastAPI
    
    app = FastAPI()
    
    
    def get_db():
        db = DBSession()
        try:
            yield db
        finally:
            db.close()
    
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Sun Mar 01 10:05:57 GMT 2026
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  9. docs/en/docs/tutorial/extra-models.md

    It will be defined in OpenAPI with `anyOf`.
    
    To do that, use the standard Python type hint [`typing.Union`](https://docs.python.org/3/library/typing.html#typing.Union):
    
    /// note
    
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Thu Mar 05 18:13:19 GMT 2026
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  10. docs_src/header_params/tutorial002_an_py310.py

    from typing import Annotated
    
    from fastapi import FastAPI, Header
    
    app = FastAPI()
    
    
    @app.get("/items/")
    async def read_items(
        strange_header: Annotated[str | None, Header(convert_underscores=False)] = None,
    ):
    Created: Sun Apr 05 07:19:11 GMT 2026
    - Last Modified: Tue Mar 26 16:56:53 GMT 2024
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